Convert AIFF-C Compressed Audio (.aifc) to iPhone Audio (.iphone-audio) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .aifc file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .m4a file when it's ready.
AIFC (AIFF-Compressed) stores audio using legacy Mac compression codecs within an IFF container variant. iPhones, like iPads, have progressively dropped support for the Mace and IMA ADPCM codecs that AIFC commonly uses. Converting AIFC to iPhone Audio produces an AAC file in M4A format — the exact audio format the iPhone was designed around, from the original 2007 model to the latest iPhone. This ensures reliable playback through the Music app, AirPods, CarPlay, and every iOS audio application.
AIFC files are orphans of Apple's own legacy — created by Macintosh systems in the 1990s but no longer reliably playable on Apple's current mobile devices. iOS has stripped out the QuickTime legacy codecs needed for Mace decompression. Converting to AAC/M4A transforms these aging audio files into the format that defines iPhone audio.
This conversion matters for people migrating old Mac audio archives to their iPhone library, institutions digitizing legacy Mac-based audio collections for mobile access, and anyone who encounters AIFC files from vintage software, multimedia titles, or educational CD-ROMs and wants to play them on a modern iPhone.
FFmpeg decodes all AIFC variants — Mace 3:1 (22 kHz, 8-bit), Mace 6:1 (22 kHz, low-quality), IMA ADPCM (various rates), and uncompressed PCM with AIFC container headers. The decoded PCM is encoded to AAC-LC at the specified bitrate (128-256 kbps) in an M4A container with proper iTunes-compatible metadata atoms. The output passes iPhone's media scanner validation and appears in the Music app library.
AIFC files using Mace compression are already low-fidelity (8-bit, 22 kHz, mono) — the AAC encoding preserves this quality perfectly at even low bitrates. For the rarer uncompressed AIFC files (16-bit, 44.1 kHz), AAC at 256 kbps from this clean source provides excellent quality through AirPods and iPhone speakers. The conversion cannot improve the source quality but ensures no additional degradation occurs.
| Device | AIFC | iPhone Audio |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
AIFC to iPhone Audio revives Apple's own legacy audio format for modern iPhone playback, converting vintage Mac audio into the AAC/M4A format that powers the entire iPhone audio experience.
安全传输
HTTPS 加密上传
隐私优先
文件处理后自动删除
无需注册
即刻开始转换
随处可用
任何浏览器，任何设备
| No |
| 特性 | AIFC | iPhone Audio |
|---|---|---|
| 全称 | AIFF-C Compressed Audio | iPhone Compatible Audio |
| 扩展名 | .aifc | .m4a |
| 最适合 | Compressed AIFF | iPhone optimized |